Postprocessing: BloomEffect with selective objects

[mrgoonie]

Hi @vanruesc, great library!

I'm trying to achieve Bloom Effect on some selective objects on the scene only.

Tried to combine this example with your library but haven't succeeded so far.

Can we have something like setSelection &selectObject function with Bloom Effect just like the OutlineEffect? 😄

Thanks,

[vanruesc]

Hi!

Can we have something like setSelection & selectObject function with Bloom Effect just like the OutlineEffect?

Yes, that feature should be easy to add.

I'm currently working on upgrading postprocessing to the latest version of three. You can expect selective bloom in the release after the next one.

[mrgoonie]

Great to hear that! Thanks, mate.

[vanruesc]

FYI: I haven't forgotton about this feature request. Just been a bit busy lately.

that feature should be easy to add.

The implementation will require more time than expected. I'm planning on moving the selective render feature to the RenderPass to avoid code duplication in the OutlinePass. Not sure when I'll get a chance to work on this, but it shouldn't be too long.

[vanruesc]

Added SelectiveBloomEffect in [email protected].

The selection feature could have been added to the existing BloomEffect, but I decided to create a new effect instead which extends BloomEffect. The selection logic requires additional rendering which has an impact on performance, so I kept it out of the standard bloom solution.

The disadvantage in performance comes from the fact that all objects in the scene need to be rendered again: non-selected objects are rendered solid black to properly occlude selected objects and the scene background.

The OutlineEffect has the same fundamental problem. A while ago, I managed to remove the additional rendering step from the GodRaysEffect by relying on depth, but that was only possible because the light source could be treated as a special object and the same method can't be applied to either the OutlineEffect or the SelectiveBloomEffect.

If you have any questions or ideas, lmk.

[mrgoonie]

Awesome! Will give it a try. Thank you @vanruesc